d) What is the probability that X is greater than its expected value? e) What is the probability that X is> 5? f) What is the probability that X is> 10? |

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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4.
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a) What is the expected value of X? 2
The lifetime, X, of a particular integrated circuit has an exponential distribution with rate of λ=0.5 per year. Thus, the density of X is:
f(x,^) = λ e-^x for 0 ≤ x ≤ ∞, λ = 0.5. is what R calls rate.
Hint: This is a problem involving the exponential distribution. Knowing the parameter for the distribution allows you to easily answer parts a,b,c and use the built-in R functions for the
exponential distribution (dexp(), pexp(), qexp()) for other parts. Or (not recommended) you should be able to use the R integrate command with f(x) defined as above or with dexp() for all parts.
b) What is the variance of X? 4
c) What is the standard deviation of X? 2
Enter a number.
d) What is the probability that X is greater than its expected value?
e) What is the probability that X is > 5?
f) What is the probability that X is > 10?
g) What is the probability that X > 10 given that X > 5?
h) What is the median of X?
1) Enter any comments in the text box below.
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Transcribed Image Text:4. DETAILS a) What is the expected value of X? 2 The lifetime, X, of a particular integrated circuit has an exponential distribution with rate of λ=0.5 per year. Thus, the density of X is: f(x,^) = λ e-^x for 0 ≤ x ≤ ∞, λ = 0.5. is what R calls rate. Hint: This is a problem involving the exponential distribution. Knowing the parameter for the distribution allows you to easily answer parts a,b,c and use the built-in R functions for the exponential distribution (dexp(), pexp(), qexp()) for other parts. Or (not recommended) you should be able to use the R integrate command with f(x) defined as above or with dexp() for all parts. b) What is the variance of X? 4 c) What is the standard deviation of X? 2 Enter a number. d) What is the probability that X is greater than its expected value? e) What is the probability that X is > 5? f) What is the probability that X is > 10? g) What is the probability that X > 10 given that X > 5? h) What is the median of X? 1) Enter any comments in the text box below. Submit Answer MY NOTES Viewing Saved Work Revert to Last Response ASK YOUR TEACHER
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